Data from the School Crime Supplement (SCS) to the National Crime Victimization Survey, a nationally representative sample survey of students ages 12 through 18, were used to examine trends in bullying at school. The SCS study is completed every other year. Data from five consecutive surveys are included in this report: school years 2004-05, 2006-07, 2008-09, 2010-11, and 2012-13. Analysis is restricted to the SCS respondents in each year who were enrolled in grades 6 through 12, and did not receive any part of their education through homeschooling during the school year. The SCS asks students whether they were bullied in the school building, on school property, on the school bus, or going to or from school. Specifically, students are asked to report being made fun of, called names, or insulted; being the subject of rumors; being threatened with harm; being pushed, shoved, tripped, or spit on; being pressured into doing things they did not want to do; being excluded from activities on purpose; and having property destroyed on purpose. It was found that: (1) The percentage of students ages 12 through 18 who reported being bullied at school was lower in 2013 than every year since 2005. In 2005, 28 percent of students ages 12 through 18 reported being bullied at school. In 2013, the percentage was 22 percent; and (2) The changes in the percentage of students ages 12 through 18 who reported being bullied at school followed a similar pattern among males and females from 2005 to 2013.